Formation behavior of acoustic cavitation in molten aluminum alloys under ultrasonic vibration

Tadashi Matsunaga*, Kenji Ogata, Tomei Hatayama, Kenji Shinozaki, Makoto Yoshida

*この研究の対応する著者

研究成果査読

2 被引用数 (Scopus)

抄録

In order to investigate behavior of acoustic cavitation in molten aluminum alloys when ultrasonic vibration was applied, we measured sound pressure in molten aluminum alloys by means of acoustic emission (AE). The frequency analysis was performed to the obtained sound pressure. As a result, the characteristic frequency of acoustic cavitation would be 5, 10 and 260 kHz. The maximum intensity at 260 kHz was increased by addition of magnesium in molten aluminum at the ultrasonic power of more than 200 W drastically. The reason why the addition of magnesium led to promote the generation of the cavitation would be caused by its relatively low surface tension and high vapor pressure. From the viewpoint of the cavitation threshold, both the decrease in the surface tension of the molten aluminum alloy and the increase in the vapor pressure will lead to generate the acoustic cavitation. Therefore, addition of zinc of 8.7 mass% and bismuth of 0.5 mass % also caused to generate acoustic cavitation.

本文言語English
ページ(範囲)214-220
ページ数7
ジャーナルKeikinzoku/Journal of Japan Institute of Light Metals
56
4
DOI
出版ステータスPublished - 2006 4

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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